碳掺杂AISI碳钢的微观结构、力学及电化学分析
Microstructural, mechanical, and electrochemical analysis of carbon doped AISI carbon steels.
作者信息
Ishtiaq Muhammad, Inam Aqil, Tiwari Saurabh, Seol Jae Bok
机构信息
Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU), Jinju, 52828, Republic of Korea.
Department of Materials Engineering and Convergence Technology, Center for K-metal, Gyeongsang National University (GNU), Jinju, 52828, South Korea.
出版信息
Appl Microsc. 2022 Oct 20;52(1):10. doi: 10.1186/s42649-022-00079-w.
The effect of carbon doping contents on the microstructure, hardness, and corrosion properties of heat-treated AISI steel grades of plain carbon steel was investigated in this study. Various microstructures including coarse ferrite-pearlite, fine ferrite-pearlite, martensite, and bainite were developed by different heat treatments i.e. annealing, normalizing, quenching, and austempering, respectively. The developed microstructures, micro-hardness, and corrosion properties were investigated by a light optical microscope, scanning electron microscope, electromechanical (Vickers Hardness tester), and electrochemical (Gamry Potentiostat) equipment, respectively. The highest corrosion rates were observed in bainitic microstructures (2.68-12.12 mpy), whereas the lowest were found in the fine ferritic-pearlitic microstructures (1.57-6.36 mpy). A direct correlation has been observed between carbon concentration and corrosion rate, i.e. carbon content resulted in an increase in corrosion rate (2.37 mpy for AISI 1020 to 9.67 mpy for AISI 1050 in annealed condition).
本研究调查了碳掺杂含量对经热处理的普通碳钢AISI钢种的微观结构、硬度和腐蚀性能的影响。通过不同的热处理，即分别进行退火、正火、淬火和等温淬火，获得了包括粗铁素体-珠光体、细铁素体-珠光体、马氏体和贝氏体在内的各种微观结构。分别使用光学显微镜、扫描电子显微镜、机电式（维氏硬度计）和电化学（Gamry恒电位仪）设备对所获得的微观结构、显微硬度和腐蚀性能进行了研究。贝氏体微观结构的腐蚀速率最高（2.68 - 12.12密耳/年），而细铁素体-珠光体微观结构的腐蚀速率最低（1.57 - 6.36密耳/年）。已观察到碳浓度与腐蚀速率之间存在直接关联，即碳含量导致腐蚀速率增加（退火状态下，AISI 1020的腐蚀速率为2.37密耳/年，AISI 1050的腐蚀速率为9.67密耳/年）。
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